Lake Pontchartrain is an estuary located in southeastern Louisiana in the United States. It covers an area of 630 square miles (1,600 km2) with an average depth of 12 to 14 feet. Some shipping channels are kept deeper through dredging. It is roughly oval in shape, about 40 miles (64 km) from west to east and 24 miles (39 km) from south to north.
Sentinel-2 image
Lake Pontchartrain from southbound causeway entrance
Lake Pontchartrain's north shore at Fontainebleau State Park near Mandeville, Louisiana, in 2004
At the southern terminus of LA 1077 in Madisonville, this lighthouse is on the west estuary of the Tchefuncte River at Lake Pontchartrain and was constructed in 1837.
St. Tammany Parish, Louisiana
St. Tammany Parish is a parish located in the U.S. state of Louisiana named after Tamanend, the legendary Lenape Chief of Chiefs and the "Patron Saint of America." At the 2020 census, the population was 264,570, making it the fourth-most populous parish in Louisiana. The parish seat is Covington. The parish was founded in 1810.
St. Tammany Parish Justice Center in Covington
St. Tammany Parish Justice Center in Covington
Madisonville's Tchefuncte River Lighthouse stands on the Saint Tammany northshore of Lake Pontchartrain. This lighthouse was built in 1837.
Round-trip trolley ticket on the St. Tammany and New Orleans Railways and Ferry Co., punched to be good on the transit line between Mandeville and Covington, Louisiana, for the date of December 30, 1915
